What happened to the Janelle from last season, the one who went to the final three?

And Howie's going right along with her! Why they don't listen to Marcallas? I'm hoping he wins HOH Thursday so Will can leave the house.
James: STFU!! I have not forgotten last year when you went in front of Ivette and swore on the Bible. I have not forgotten when you lied to the alliance you were on that included your girlfriend. You went after Jase because he was playing YOUR GAME. And now Janelle tells you she changes her mind (which was dumb on her part) and you get in a tissy fit and vow revenge. YOU DID THE SAME THING LAST YEAR!!!! And what you do...you run to the floaters and tell them what's going on. Again, STFU!!